# M16-GAP-00231 Status

status: done
task: armature.collection_unassign_named operator LOCAL_EXACT slice
updated: 2026-08-22 America/New_York

scope:

- The minimal fixture contains one selected bone assigned to both a named source collection and a retained collection, with the retained collection active.
- Desktop runs `ARMATURE_OT_collection_unassign_named` with `name=Source` and `bone_name=...`, `poll=true`, and `FINISHED`, removing only the named source membership while preserving the active retained membership and selection through save/reopen.
- The existing Main reader's bone collection member IDs provide the observable named unassignment; no new data-block, editor, or browser behavior was added.

evidence:

- The generator, desktop checker, npm comparator, direct comparator, and task-context checks passed. Repeated checker runs recognize the already-empty named collection and remain idempotent.
- WASM/Main observes an empty named source collection and the retained bone ID, preserves them across save/reopen, and rejects malformed Blend input without Main mutation.
- Chromium-only policy was preserved; no Firefox/WebKit run was made.

nextTask: `M16-GAP-00232`